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Blog of Hydro-Tek | Malaysia AC Power Pack | AC Hydraulic Power Pack | DC Hydraulic Power Pack | Philippine AC Power Pack Supplier

Frequently Ask Questions of Oil Cleaner Cart (OCC)

Posted by on 17 May 2012 | 0 Comments

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1) What is Oil Cleaner Cart (OCC)?
Oil Cleaner Cart or OCC is portable cleaning device that is very convenient and easy to use with your
in-plant machinery and mobile hydraulic equipment that using mineral based fluid. It serves as
supplement to any existing filtration on a specific hydraulic application with viscosity of oil up to 108 cst.

2) When do you need to change your oil?
Lubrication, deterioration and malfunction are due to damages caused by contamination. In this condition
contaminated oil will normally be replaced with new oil because it is dirty and to avoid further damages
to your system. But with OCC, you don’t have to throw away your oil. Instead, you may clean it and reuse it.

3) Does OCC same as other inline filter?
Any standard hydraulic system has a filter and filter supplier may easily be found anywhere. However,
with OCC it not only just filters your oil. It can guarantee perfect clean oil for your system by removing
all the particles that are not removed by conventional filters.

4) How does OCC filter and clean the oil?
With OCC, your oil will go through 2 stages of filtrations. The first stage will do a pre-cleaning of oil to
remove big particles. The second stage of filtering will not only filter but also clean your oil by removing
solid particle, absorb water, remove sludge and other oil oxidation residues.

5) What makes OCC more efficient and effective compare to other inline filter?
Two units of Triple R bypass oil cleaner are installed in this OCC whereby it operates simultaneously.
The thickness of the filter medium is 114mm which is different and severally thicker than other
conventional inline filter. Because of its specially designed cellulose medium, it allows absorption of
water and oxidation residues.

6) How can OCC help in your investment?
OCC can save your maintenance expenditure. With its filtration specialty, the cleaning process can be
performed. This will save almost 50 percent of your oil cost, where no extra manpower, no rent and
no additional charges need to apply. Additionally, OCC support the environment.

7) Does OCC effortless to use?
OCC is easy to use with your hydraulic system. It is low running cost and easy installation and
maintenance. Owing to its portability, it also can be removed from one machine to another.

8) When is to change the element?
Besides Triple R oil cleaner, standard OCC is installed with Parker filter whereby the pressure gauge is
equipped together. The gauge is for easier to check the element contamination level and let you
know when is to change the element.

9) How can this cleaning device affect the life of your oil?
With OCC, oil contamination level is kept at a 50 to 100 time lower concentration. Cleanliness of oil
can reach up to 67 times cleaner and 67 times less contaminant which gives a longer life to oil. A
normal period of changing oil with conventional filters will require every two months. Nonetheless,
with OCC, it require once every six months.

10) Does the cleaned oil reach the standard of international requirement?
Many manufacturers want to protect their machinery and equipment from breakdown caused by
contamination. OCC effectively guarantee the standard cleanliness of oil grade by ISO of 16/14/11
and NAS standard of 7 or better. This cleaning cart can also be very effective to reach and maintain
the cleanliness level of other components of the system. This will improves machine reliability and
productivity.

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What is a Rotating Joint?

Posted by on 24 February 2012 | 0 Comments

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ROTOTECH rotating joints are used to transfer steam, water, hot oil, hydraulics, air, etc. from stationary supply lines to rotating machine parts such as shafts, drums or rolls.
In textile, rotating joints are used to heat or cool drums/rolls without energy lose.
In paper sector; rolls which used to dry the wet paper, must be heated. To heat these rolls; hot oil or steam is used. While rolls rotate, supply and return lines are stationary. Rotating joints are used to connect these stationary pipes to rotating rolls without any leakage.
Another example may be iron & steel industry. In continuous casting process hot steel is cooled with rolls. These rolls are cooled from inside and outside. Demineralized water is used to cool these rolls from inside. While hot steel passes, these rolls rotate and rotating joints are used to transfer water from stationary supply lines to rotating rolls.
Design of Rotating Joints:
While rotating joint design, configuration and applications are changed, they have four basic components; housing, shaft, bearings and seals.
The most important component of the rotating joint is the seal. Seal prevents the medium to leak from the joint. Rotating joints has one static seal (o-ring or lip seal) and one dynamic seal (mechanical seal).
Second most important component of the rotating joint is the bearing. Rotating joint may have one or multiple bearings. There are two types of bearings; 1) Roller bearings (which has rolling components inside like ball bearings); 2) Non-roller bearings (which doesn't have rolling components inside, like carbon graphite or bronze bearings)

Shaft is the component that allows the medium to flow inside the joint to the drum or roll. In most cases shaft will rotate with the roll. In some cases where the size of the rotating joint is bigger, shaft will be stationary and the housing will rotate with the roll.

Housing is the component that holds all internal parts together. The housing has an inlet port (threaded or flanged) where inlet hose is assembled. If the rotating joint is dual flow, housing will also has a second port to remove the medium from the roll.
In small rotating joints, the housing is stationary and shaft rotates with the roll. And in larger models, the housing is assembled to the drum with flange and bolts and so that housing will rotate with the drum.

When choosing the right product, pay attention to

• Application parameters
• Temperature of the surroundings
• Medium pressure
• Spare parts and warranty
• Consultancy

Please bear in mind that all factories have different application parameters and wrong product selections will cause bigger problems that increases the maintenance costs.

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A COOLBIT Cooling System Selection

Posted by on 10 April 2011 | 0 Comments

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1 Determination of input data
1.1 Heat Rejection
N = Installed power in the hydraulic system in kW
Q = Heat Rejection (heat to be dissipated) in kW
Hydraulic pump driven by an electric motor, then
Q = ¾N or 0.75 x N
If there is hydraulic motor in the system, then
Q = N
1.2 V = Oil flow in ℓ/min
1.3 T oil = Oil inlet temperature or maximum allowed Oil temperature in °C
1 4 T amb = Cooling air flow temperature or ambient temperature in °C
1.5 ETD = Entering temperature difference
ETD = T oil T amb
2 Specific Heat Rejection
Q sp = Specific heat rejection, the required performance of the heat exchanger
in kW/°C or kcal/h°C
Q sp = Q / ETD
3 Select according to diagram
4 Determination of Oil Temperature Difference from selected cooler
Q act = Actual heat rejection in kW
Q sp act = Actual specific heat rejection in kW/°C or kcal/h°C (from diagram)
ΔT = Oil temperature difference in °C
Q act = Q sp act x ETD
Thus,
ΔT = 33 x (Q a c t / V)
5 Pressure Drop
Obtain ΔP = Pressure drop @30 cSt oil viscosity from diagram
4.1 Obtain pressure drop for other oil viscosities
The pressure drop curves are based on viscosity of 30 cSt.
Thus, use conversion factor f to calculate pressure drop at other viscosities.
cSt
10
20
30
40
50
60
80
f
0.5
0.75
1
1.2
1.4
1.6
2.1
Pressure drop of type AH0608T is 0.55 bar @30 ℓ/min & 30 cSt.
Assume an oil type ISO VG46 is used @60°C having a viscosity of 20 cST
Then,
New ΔP = 0.55 x 0.75
= 0.41 bar

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Example of the use of Pressure Intensifier

Posted by on 5 March 2011 | 0 Comments

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Since the pressure intensifier came onto the market, it has been used in a large number of systems.The list below gives an idea of its versatility and shows its typical areas of application :

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Use of the Pressure Intensifier

Posted by on 5 March 2011 | 0 Comments

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In principle, the pressure intensifier can be used wherever there is a need for an unusually high pressure at a given time. In general, the system will be as shown in Figure 1, in which one cylinder is controlled with an ordinary 4/3 directional valve. The pressure intensifier is mounted directly on the cylinder, and the expensive high‐pressure connection is reduced to a minimum. In the example, the pressure intensifier is expanded with an integrated pilot‐operated check valve.

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Pressure Intensifiers in Hydraulic Systems

Posted by on 5 March 2011 | 0 Comments

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In hydraulic systems, it is often necessary to use varying operating pressures. A system which works perfectly with a high rate of efficiency can be achieved only if it is possible to adjust the pressure precisely to the load in question.

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How the Hydraulic Pressure Intensifier works ?

Posted by on 2 March 2011 | 0 Comments

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1). The oil is supplied to the "P" port and pases through the check valve CV1, CV2 and pilot operated check valve POV (option) to the high‐pressure side. At the same time, the "T" port is connected to the tank.

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How to choose a good condition DC motor and pump?

Posted by on 23 February 2011 | 0 Comments

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The dimensioning of DC motors and electro‐hydraulic pumps are based on the duty types.
In particular,the output power depends on the temperature reached by the motor.

 

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